Chemistry: Chemical Reaction And Equation Questions!
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There are two changes that can be observed when we mix substances together and this is either physical or chemical changes. A chemical reaction involves the rearrangement of the molecular structure of a substance. Test out your understanding of chemical reactions by taking up the quiz below. All the best and come back for more quizzes like these to aid in your revision.
- 1.
![What are the coefficients of the correctly balanced equations?
----Fe2O3 + ----CO ----Fe + ---CO2]( "What are the coefficients of the correctly balanced equations?
----Fe2O3 + ----CO ----Fe + ---CO2")
- A.
0,2,2,3
- B.
1,3,2,3
- C.
1,2,2,2
- D.
2,6,4,3
- 2.
- A.
The test tube becomes cold due to release of heat energy
- B.
The test tube becomes hot due to release of heat energy
- C.
The test tube becomes hot due to absorption of heat energy
- D.
The test tube becomes cold due to absorption of heat energy
- 3.Which one is a double displacement reaction?
- A.
BaCl2 + Na2SO4 --------> BaSO4 + 2NaCl
- B.
CaO + H2O ------------> Ca(OH)2
- C.
2Pb(NO3)2 --------> 2PbO + 4NO2 + O2
- D.
Zn + 2AgNO3 ----------> Zn(NO3)2 + 2Ag
- 4.
- A.
(i) and (ii)
- B.
(ii) and (iii)
- C.
(i) and (iv)
- D.
(iii) and (iv)
- 5.Zinc + Sulphuric acid → Zinc sulphate + (X) What will be the product “X”?
- A.
Hydrogen
- B.
ZnO
- C.
Zinc Sulphite
- D.
Nitrogen
- 6.
- A.
(i) and (ii)
- B.
(i) and (iii)
- C.
(i), (ii) and (iii)
- D.
(iv) only
- 7.
- A.
H2 + O2 H2O
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- B.
Mg + CuSO2 MgSO4 + Cu
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- C.
NaOH + HCl NaCI + H2O
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- D.
Zn + S ZnS
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- 8.Aluminum reacts with copper sulphate to produce
- A.
Cu and Al2(SO4)3
- B.
CuO and Al2(SO4)3
- C.
Cu, Al2S3 and SO2
- D.
CuO, Al2S3 and SO2
- 9.What happens when dilute HCl is added to iron filings? Tick the correct answer.
- A.
Hydrogen gas and iron chloride are produced.
- B.
Chlorine gas and iron hydroxide are produced.
- C.
No reaction takes place.
- D.
Iron salt and water are produced.
- 10.
- A.
(i) and (ii)
- B.
(ii) and (iii)
- C.
(i) and (iv)
- D.
(iii) and (iv)
- 11.Which among the following are endothermic processes? i. Reaction of quick lime with water ii. Dilution acid with water iii. Evaporation of water iv. Sublimation of solid ammonium chloride
- A.
(i) and (ii)
- B.
(ii) and (iii)
- C.
(i) and (iv)
- D.
(iii) and (iv)
- 12.Barium chloride on reacting with ammonium sulphate forms barium sulphate and ammonium choloride. Which of the following correctly represents the type of the reaction involve? i. Displacement reaction ii. Precipitation reaction iii. Combination reaction iv. Double displacement reaction
- A.
(i) , (iii)
- B.
(ii), (iii)
- C.
(iii)
- D.
(ii), (iv)
- 13.
- A.
KMnO4 is oxidizing agent, it oxidizes FeSO4
- B.
FeSO4 acts as an oxidizing agent and oxidizes KMnO4
- C.
The color disappears due to dilution: no reaction is involved
- D.
KMnO4 is an unstable compound and decomposes in presence of FeSO4 to a colorless compound.
- 14.
- A.
2Ca+O2 2CaO
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- B.
Ca(OH)2 heat CaO+ H2O
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- C.
Ca(OH)+CO2 CaCO3+H2O
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- D.
CaO+H2O Ca(OH)2
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- 15.The electrolytic decomposition of water gives H2 and O2 in the ration of
- A.
1:2 by volume
- B.
2:1 by volume
- C.
8:1 by mass
- D.
1:2 by mass
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